CA1248332A - Method of forming a brake drum - Google Patents
Method of forming a brake drumInfo
- Publication number
- CA1248332A CA1248332A CA000469056A CA469056A CA1248332A CA 1248332 A CA1248332 A CA 1248332A CA 000469056 A CA000469056 A CA 000469056A CA 469056 A CA469056 A CA 469056A CA 1248332 A CA1248332 A CA 1248332A
- Authority
- CA
- Canada
- Prior art keywords
- brake drum
- fins
- predetermined location
- open end
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/10—Drums for externally- or internally-engaging brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D65/82—Features relating to cooling for internally-engaging brakes
- F16D65/827—Features relating to cooling for internally-engaging brakes with open cooling system, e.g. cooled by air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/1304—Structure
- F16D2065/1332—Structure external ribs, e.g. for cooling or reinforcement
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49863—Assembling or joining with prestressing of part
- Y10T29/49865—Assembling or joining with prestressing of part by temperature differential [e.g., shrink fit]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Abstract:
A method of forming a brake drum includes the steps of casting an iron cylindrical brake drum with a flange end and an open end to include a plurality of generally axially extending fins around an exterior surface thereof. The cast-ing includes providing the fins with radially extending side walls which diverge along a length thereof from the open end to a widest distance therebetween at a predetermined location from the open end and converge along the length thereof from the predetermined location toward the flange end. Accordingly, adjacent side walls of adjacent fins define a space there-between having its narrowest portion at the predetermined location. A braking surface is machined about an interior surface portion of the cylindrical brake drum. A portion of the top of the fins is machined on either side of the predetermined locations to form a cylindrical array of seats each with a shoulder located inwardly of the predetermined locations. A steel band is formed and secured to the brake drum on the seat of the fins to encircle the brake drum at the predetermined location.
A method of forming a brake drum includes the steps of casting an iron cylindrical brake drum with a flange end and an open end to include a plurality of generally axially extending fins around an exterior surface thereof. The cast-ing includes providing the fins with radially extending side walls which diverge along a length thereof from the open end to a widest distance therebetween at a predetermined location from the open end and converge along the length thereof from the predetermined location toward the flange end. Accordingly, adjacent side walls of adjacent fins define a space there-between having its narrowest portion at the predetermined location. A braking surface is machined about an interior surface portion of the cylindrical brake drum. A portion of the top of the fins is machined on either side of the predetermined locations to form a cylindrical array of seats each with a shoulder located inwardly of the predetermined locations. A steel band is formed and secured to the brake drum on the seat of the fins to encircle the brake drum at the predetermined location.
Description
~2~33~
ETHOD OF FORMING A BRAKE DRUM
Back~round of the Invention Field of the Invention. This invention relates to the method of forming a brake drum and, more specifically, such a brake drum which has a plurality of generally axially extending fins around an exterior surface thereof and a steel band secured to the top of the fins and encircling the braking drum.
Descri~ion of the Prior Art. Although drum brakes and the brake drums therefore are well known in the prior art, there remains a problem with dissipation of h~at to ensure that there is effective braking during extensive use. Accordingly, many brake drums have heretofore employed fins or other cooling surfaces about the lS exterior surface tbereof as a means for directing air along the exterior surface to remove the heat generated in the brake drum. However, many brake drum~ of this type include ~ins which are oriented helically or at an angle to provide an easy path for the cooling air therebetween. On the other hand, providing fins of this type has significantly complicated manufacture since most such brake drums are cast and casting in this manner normally requires some type of core unless the manufacture includes~ some means for otherwise cutting or forming grooves or fins.
;
, :: :
, ' `; ~ :
.
~1~48332 ( Additionally, in any such brake drum, there remains a concern for its overall strength. Accordingly, it would be advantageous to incorporate any means which would improve the overall strength of the brake drum without unduly adding to its weight.
Summary of the Invention It is therefore an object of this invention to provide a method of forming a brake drum by simplified casting while providing a steel band tberefor which will add to the overall strengtn of the br~ke arum.
These and other objects of the invention are provided in a preferred embo~iment ~hereof ineluding the method of forming a brake drum including the steps of casting an iron cylindrical brake drum with a flange end and an open end to include a plurality of generalLy axially extending fins around an exterior surface thereof. `The casting includes providing the fins with radially extending side walls which diverge along a lengtb thereof from the open end to a widest distance therebetween at the predetermined location from the open end and conver~e along the length thereof from the predetermined location toward the flange end. Accordingly, adjacent side walls of adjacent fins define a space there-between having its narrowest portion at the predetermined location. A braking surface is machined about an interior surface portion of the cylindrical brake drum. A portion of the top of the fins is machined on eithee side of the pre-determined locations to form a cylindrical array of seats each with a shoulder located inwardly of the predetermined locations. A steel band is formed and secured to the brake drum on the seat of the fins ~o encircle the brake drum at the predetermined location.
Brief Descrip~ion of the Drawings Figure 1 is a fragmentary view, partially in section of the preferred drum brake including various features of the invention.
S Figure 2 is a fragmentary sectional view of the cylindrical braking drum of the invention as it is initially cast. ' Figure 3 is a sectional view of the braking drum as seen in Figure 2 after machining.
Figure 4 is a fragmentary sectional view of the steel band prior to installation on the cylindrical brake drum.
Detailea Description of the Preferred Embodiment As seen in Figure 1, the preferred brake drum 10 is mounted for rotation with a hub (not shown) supporting a wheel 12 of a heavy duty truck or trailer. The brake drum 10 includes the cylindrical brake drum 14 having an open ,end 16 and a flange end 18 by which ~he brake drum 10 is secured to the hub. As shown in Figure 1, ~he wheel 12 with which the preferred brake drum 10 is associated is only slightly larger than the brake drum 10 and is of such a design which includes no significant openings or holes tbrough the radial wall 20 thereof. In other words, where the rim portion of the wheel 12 to be significantly larger than the brake drum 10 or to include a plurality of openings in the radial wall 20, such as is found in spoked wheels, then the movement of cooling air about the brake drum 10 would not be considered as significant. However, with such a con~iguration in which t~e flow of air is restricted, it is desirable to include an efficient, reliable means for cooling the exterior surface 22 of the brake drum 10. Obviously, cooling the brake drum surface 22 will allow heat to also be dissipated from the braking surface 24 of the brake drum 10.
~Z4~3332 ( To facilitate the air cooling, the pref~rred brake drum 10 is provided a plurality of generally axially extending fins 26 around the exterior surface 22.
However, the preferred fins 26 are not designed to extend helically about the exterior surface 22 but are instead provided a contour which will be seen to produce the desired flow of air therebetween. Specifically, each of the fins 26 has radially extending side walls 28, 30 which diverge along a length thereof from the open. end 16 to have a widest distance therebetween at a predetermined location 32 from the open end 16. The side walls 28, 30 converge along the length thereof from the predetermined location 32 to their terminal end at the flanged end 18 of the brake drum 14. Accordingly, adjacent side walls 30, 28 of adjacent fins 26 define a space 34 therebetween having its narrowest portion 36 at the predetermined location 32.
However, providing a contour such as described would not ensure the desired air flow as indicated by ~he plurality of arrows shown in Figure 1. Accordingly, to produce a venturi effect at the narrowest portion 36 of the space 34, a steel band 38 is secured to aod encircles the brakè drum 14 at the predetermined location 32.
The steel band cooperat~s With the adjacent side walls 30, 28 ana the exterior surface 22 of the brake drum 14 to define a cooling air channel 40 at the narrowest portion 36 or each of the spaces 34.
To best produce the desired air flow as snown in Figure 1, tbe predetermine~ location 32 and tbe encircling steel band 38 are located closer to the opened end 16 than the flanged end 18 of thë brake drum 14.
Locating the steel band 38 in this region significantly adds to the overall strength of the preferred brake drum 10 since the greater forces acting thereon will be experienced at the opened end 16. Further, since the steel band 38 will add significant strength to the brake , drum 10 when compared to the cast iron which is utilized for the brake drum 14, the overall configuration is significantly stronger without adding unduly to the overall weight of the brake drum 10.
Although the preferred brake drum 10 as described hereinabove would produce some venturi effect to cause the desired air flow in the space 34 between the fins 26, there is another preferred feature of the contour of the fins 26 which will further encourage the desired air flow without unduly complicating the casting of the brake drum 10. Specifically, as seen in Figure 1, the brake drum 10 is designed to primarily rotate in the direction as indicated by the arrow D. With the brake drum 10 primarily rotating in a counterclockwise direction when viewed from the right, a portion 42 of the side walls 30 of each of the fins 26 between the open end 16 and the predetermined location 32 and facing toward the direction D extends axially~ A corresponding portion 44 of the side walls 28 of each adjacent fin 26 between the open end 16`and the predetermined location 32 and facing away from the normal direction D is inclined from the open end 16 to the predetermined location 32 in a direction which is circumferentially opposite from the normal direction D of rotation. Accordingly, the space 34 is provided a converging profile at the open end 16 which tends to scoo~ the air into the narrowest portion 36 thereof in order to ensure the venturi action on tbe air will be initiated for proper flow through the space 34.
In order to provide the preferred brake drum 10, the ~0 cylindrical brake drum 14 is initially cast of iron as seen in Figure 2. Since the profile of the fins 26 do not include any portion thereof which overlap in an axial direction, the preferred brake drum 14 is cast with the axially extending fins 26 thereof being formed by dies which would meet at the predetermined location 32. As a result, the preferred cylindrical brake drum 14 can be \~ , ~ 6 -( manufactured in green sand without requiring cores during the casting operation.
As seen in Figure 3, the cast brake drum 14 of Figure 2 is machined to provide the desired braking surface 24 and to remove the top 46 of the fins 26 in a location thereof for receipt of the steel band 38.
Specifically, a shoulaer 48 is provided to establish the desired location of the end of the steel band 38.
As seen in Figure 4, tne steel band 38 is formed in a cont;nuous ring and is sized to be received on the surface at the top 46 of each of the fins 26. It has been found that there are two effective means for mounting and securing the steel band 38 on the fins 26.
First, it is possible for the steel band 38 to be simply pressed fit over the top 46 until contact is made at the shoulder 48. However, depending on the desired dimensions of the brake drum 10 and the type of fit desired for the steel band 38 thereof, a second means includes heatin~ the steel band to a temperature of 1000F to 1100F and then positioning the steel band at the predetermined location 32 as described and allowing it to cool.
Although the preferred embodiment of the invention is described hereinabove, it shoula be clear that any number of alterations could be made thereto without departing from the scope of the invention as claimed.
~
.
. .
ETHOD OF FORMING A BRAKE DRUM
Back~round of the Invention Field of the Invention. This invention relates to the method of forming a brake drum and, more specifically, such a brake drum which has a plurality of generally axially extending fins around an exterior surface thereof and a steel band secured to the top of the fins and encircling the braking drum.
Descri~ion of the Prior Art. Although drum brakes and the brake drums therefore are well known in the prior art, there remains a problem with dissipation of h~at to ensure that there is effective braking during extensive use. Accordingly, many brake drums have heretofore employed fins or other cooling surfaces about the lS exterior surface tbereof as a means for directing air along the exterior surface to remove the heat generated in the brake drum. However, many brake drum~ of this type include ~ins which are oriented helically or at an angle to provide an easy path for the cooling air therebetween. On the other hand, providing fins of this type has significantly complicated manufacture since most such brake drums are cast and casting in this manner normally requires some type of core unless the manufacture includes~ some means for otherwise cutting or forming grooves or fins.
;
, :: :
, ' `; ~ :
.
~1~48332 ( Additionally, in any such brake drum, there remains a concern for its overall strength. Accordingly, it would be advantageous to incorporate any means which would improve the overall strength of the brake drum without unduly adding to its weight.
Summary of the Invention It is therefore an object of this invention to provide a method of forming a brake drum by simplified casting while providing a steel band tberefor which will add to the overall strengtn of the br~ke arum.
These and other objects of the invention are provided in a preferred embo~iment ~hereof ineluding the method of forming a brake drum including the steps of casting an iron cylindrical brake drum with a flange end and an open end to include a plurality of generalLy axially extending fins around an exterior surface thereof. `The casting includes providing the fins with radially extending side walls which diverge along a lengtb thereof from the open end to a widest distance therebetween at the predetermined location from the open end and conver~e along the length thereof from the predetermined location toward the flange end. Accordingly, adjacent side walls of adjacent fins define a space there-between having its narrowest portion at the predetermined location. A braking surface is machined about an interior surface portion of the cylindrical brake drum. A portion of the top of the fins is machined on eithee side of the pre-determined locations to form a cylindrical array of seats each with a shoulder located inwardly of the predetermined locations. A steel band is formed and secured to the brake drum on the seat of the fins ~o encircle the brake drum at the predetermined location.
Brief Descrip~ion of the Drawings Figure 1 is a fragmentary view, partially in section of the preferred drum brake including various features of the invention.
S Figure 2 is a fragmentary sectional view of the cylindrical braking drum of the invention as it is initially cast. ' Figure 3 is a sectional view of the braking drum as seen in Figure 2 after machining.
Figure 4 is a fragmentary sectional view of the steel band prior to installation on the cylindrical brake drum.
Detailea Description of the Preferred Embodiment As seen in Figure 1, the preferred brake drum 10 is mounted for rotation with a hub (not shown) supporting a wheel 12 of a heavy duty truck or trailer. The brake drum 10 includes the cylindrical brake drum 14 having an open ,end 16 and a flange end 18 by which ~he brake drum 10 is secured to the hub. As shown in Figure 1, ~he wheel 12 with which the preferred brake drum 10 is associated is only slightly larger than the brake drum 10 and is of such a design which includes no significant openings or holes tbrough the radial wall 20 thereof. In other words, where the rim portion of the wheel 12 to be significantly larger than the brake drum 10 or to include a plurality of openings in the radial wall 20, such as is found in spoked wheels, then the movement of cooling air about the brake drum 10 would not be considered as significant. However, with such a con~iguration in which t~e flow of air is restricted, it is desirable to include an efficient, reliable means for cooling the exterior surface 22 of the brake drum 10. Obviously, cooling the brake drum surface 22 will allow heat to also be dissipated from the braking surface 24 of the brake drum 10.
~Z4~3332 ( To facilitate the air cooling, the pref~rred brake drum 10 is provided a plurality of generally axially extending fins 26 around the exterior surface 22.
However, the preferred fins 26 are not designed to extend helically about the exterior surface 22 but are instead provided a contour which will be seen to produce the desired flow of air therebetween. Specifically, each of the fins 26 has radially extending side walls 28, 30 which diverge along a length thereof from the open. end 16 to have a widest distance therebetween at a predetermined location 32 from the open end 16. The side walls 28, 30 converge along the length thereof from the predetermined location 32 to their terminal end at the flanged end 18 of the brake drum 14. Accordingly, adjacent side walls 30, 28 of adjacent fins 26 define a space 34 therebetween having its narrowest portion 36 at the predetermined location 32.
However, providing a contour such as described would not ensure the desired air flow as indicated by ~he plurality of arrows shown in Figure 1. Accordingly, to produce a venturi effect at the narrowest portion 36 of the space 34, a steel band 38 is secured to aod encircles the brakè drum 14 at the predetermined location 32.
The steel band cooperat~s With the adjacent side walls 30, 28 ana the exterior surface 22 of the brake drum 14 to define a cooling air channel 40 at the narrowest portion 36 or each of the spaces 34.
To best produce the desired air flow as snown in Figure 1, tbe predetermine~ location 32 and tbe encircling steel band 38 are located closer to the opened end 16 than the flanged end 18 of thë brake drum 14.
Locating the steel band 38 in this region significantly adds to the overall strength of the preferred brake drum 10 since the greater forces acting thereon will be experienced at the opened end 16. Further, since the steel band 38 will add significant strength to the brake , drum 10 when compared to the cast iron which is utilized for the brake drum 14, the overall configuration is significantly stronger without adding unduly to the overall weight of the brake drum 10.
Although the preferred brake drum 10 as described hereinabove would produce some venturi effect to cause the desired air flow in the space 34 between the fins 26, there is another preferred feature of the contour of the fins 26 which will further encourage the desired air flow without unduly complicating the casting of the brake drum 10. Specifically, as seen in Figure 1, the brake drum 10 is designed to primarily rotate in the direction as indicated by the arrow D. With the brake drum 10 primarily rotating in a counterclockwise direction when viewed from the right, a portion 42 of the side walls 30 of each of the fins 26 between the open end 16 and the predetermined location 32 and facing toward the direction D extends axially~ A corresponding portion 44 of the side walls 28 of each adjacent fin 26 between the open end 16`and the predetermined location 32 and facing away from the normal direction D is inclined from the open end 16 to the predetermined location 32 in a direction which is circumferentially opposite from the normal direction D of rotation. Accordingly, the space 34 is provided a converging profile at the open end 16 which tends to scoo~ the air into the narrowest portion 36 thereof in order to ensure the venturi action on tbe air will be initiated for proper flow through the space 34.
In order to provide the preferred brake drum 10, the ~0 cylindrical brake drum 14 is initially cast of iron as seen in Figure 2. Since the profile of the fins 26 do not include any portion thereof which overlap in an axial direction, the preferred brake drum 14 is cast with the axially extending fins 26 thereof being formed by dies which would meet at the predetermined location 32. As a result, the preferred cylindrical brake drum 14 can be \~ , ~ 6 -( manufactured in green sand without requiring cores during the casting operation.
As seen in Figure 3, the cast brake drum 14 of Figure 2 is machined to provide the desired braking surface 24 and to remove the top 46 of the fins 26 in a location thereof for receipt of the steel band 38.
Specifically, a shoulaer 48 is provided to establish the desired location of the end of the steel band 38.
As seen in Figure 4, tne steel band 38 is formed in a cont;nuous ring and is sized to be received on the surface at the top 46 of each of the fins 26. It has been found that there are two effective means for mounting and securing the steel band 38 on the fins 26.
First, it is possible for the steel band 38 to be simply pressed fit over the top 46 until contact is made at the shoulder 48. However, depending on the desired dimensions of the brake drum 10 and the type of fit desired for the steel band 38 thereof, a second means includes heatin~ the steel band to a temperature of 1000F to 1100F and then positioning the steel band at the predetermined location 32 as described and allowing it to cool.
Although the preferred embodiment of the invention is described hereinabove, it shoula be clear that any number of alterations could be made thereto without departing from the scope of the invention as claimed.
~
.
. .
Claims (5)
1. A method of forming A brake drum comprising the steps of:
casting an iron cylindrical brake drum with a flange end and an open end to include a plurality of generally axially extending fins around an exterior surface thereof, said cast-ing including providing said fins with radially extending side walls which diverge along a length thereof from said open end to a widest distance therebetween at a predetermined location from said open end and converge along said length thereof from said predetermined location toward said flange end, whereby adjacent said side walls of adjacent said fins define a space therebetween having its narrowest portion at said predetermined location;
machining a braking surface about an interior surface portion of said cylindrical brake drum;
machining a portion of the top of said fins on either side of said predetermined locations to form a cylindrical array of seats each with a shoulder located inwardly of said predetermined locations;
forming a steel band; and securing said steel band to said brake drum on said seat of said fins to encircle said brake drum at said predetermined location.
casting an iron cylindrical brake drum with a flange end and an open end to include a plurality of generally axially extending fins around an exterior surface thereof, said cast-ing including providing said fins with radially extending side walls which diverge along a length thereof from said open end to a widest distance therebetween at a predetermined location from said open end and converge along said length thereof from said predetermined location toward said flange end, whereby adjacent said side walls of adjacent said fins define a space therebetween having its narrowest portion at said predetermined location;
machining a braking surface about an interior surface portion of said cylindrical brake drum;
machining a portion of the top of said fins on either side of said predetermined locations to form a cylindrical array of seats each with a shoulder located inwardly of said predetermined locations;
forming a steel band; and securing said steel band to said brake drum on said seat of said fins to encircle said brake drum at said predetermined location.
2. The method of forming a brake drum as set forth in claim 1, wherein said step of casting is accomplished with two dies that meet at said predetermined location which are closer to said open end than said flange end.
3. A method of forming a brake drum as set forth in claim 1, wherein the steps of casting include establishing a primary direction of rotation of said brake drum by providing a por-tion of one of said adjacent side walls of each of said fins between said open end and said predetermined location and facing toward said direction to extend axially and a corres-ponding portion of one of said side walls of each of said fins between said open end and said predetermined location and facing away from said direction to incline from said open end to said predetermined location in a direction which is circumferentially opposite from said direction.
4. A method of forming a brake drum as set forth in claim 1, wherein said steel band is press fit on said seats of said fins until making contact with said shoulder.
5. A method of forming a brake drum as set forth in claim 1, wherein said steel band is heated to cause expansion thereof, positioned about said seat of said fins against said shoulder, and allowed to cool to be secured about said brake drum.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/572,273 US4536936A (en) | 1984-01-20 | 1984-01-20 | Method of forming a brake drum |
| US572,273 | 1984-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1248332A true CA1248332A (en) | 1989-01-10 |
Family
ID=24287089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000469056A Expired CA1248332A (en) | 1984-01-20 | 1984-11-30 | Method of forming a brake drum |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4536936A (en) |
| EP (1) | EP0153996B1 (en) |
| JP (1) | JPS60155020A (en) |
| BR (1) | BR8406384A (en) |
| CA (1) | CA1248332A (en) |
| DE (2) | DE153996T1 (en) |
| MX (1) | MX161061A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5408724A (en) * | 1993-05-03 | 1995-04-25 | Wayne-Dalton Corporation | Jamb bracket and track assembly for sectional overhead doors |
| US5826684A (en) * | 1995-12-07 | 1998-10-27 | Dayton Walther Corporation | Brake drum having ribs on drum outer surface |
| US10316913B2 (en) * | 2015-09-24 | 2019-06-11 | Webb Wheel Products, Inc. | Vehicle brake drums having braking walls enhanced with compressive stresses |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1661325U (en) * | ||||
| US2740502A (en) * | 1951-05-10 | 1956-04-03 | Chrysler Corp | Air cooled wheel brake |
| DE1042984B (en) * | 1954-04-03 | 1958-11-06 | Daimler Benz Ag | Light metal brake drum with cast iron brake ring |
| US2888105A (en) * | 1954-12-20 | 1959-05-26 | Bendix Aviat Corp | Composite disk and shoe brake |
| US3151709A (en) * | 1962-07-10 | 1964-10-06 | Troy Leonard | Brake drum |
| US3807913A (en) * | 1972-05-19 | 1974-04-30 | Motor Wheel Corp | Apparatus for making a brake drum ring compact |
| US3841448A (en) * | 1973-06-14 | 1974-10-15 | Budd Co | Reinforced brake drum |
| US4025751A (en) * | 1975-04-28 | 1977-05-24 | Xerox Corporation | Fuser roll sleeve |
| US4266638A (en) * | 1977-12-08 | 1981-05-12 | Ford Motor Company | Composite brake drum |
-
1984
- 1984-01-20 US US06/572,273 patent/US4536936A/en not_active Expired - Fee Related
- 1984-10-31 DE DE198484113104T patent/DE153996T1/en active Pending
- 1984-10-31 DE DE8484113104T patent/DE3477957D1/en not_active Expired
- 1984-10-31 EP EP84113104A patent/EP0153996B1/en not_active Expired
- 1984-11-30 CA CA000469056A patent/CA1248332A/en not_active Expired
- 1984-11-30 JP JP59253972A patent/JPS60155020A/en active Granted
- 1984-12-12 BR BR8406384A patent/BR8406384A/en unknown
-
1985
- 1985-01-04 MX MX203964A patent/MX161061A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BR8406384A (en) | 1985-10-08 |
| JPS60155020A (en) | 1985-08-14 |
| JPH0155813B2 (en) | 1989-11-27 |
| EP0153996A1 (en) | 1985-09-11 |
| US4536936A (en) | 1985-08-27 |
| MX161061A (en) | 1990-07-18 |
| DE3477957D1 (en) | 1989-06-01 |
| EP0153996B1 (en) | 1989-04-26 |
| DE153996T1 (en) | 1986-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |